1. Evolution and Ecology Group, Department of Biology, P.O. Box 60, Middle Tennessee State University, Murfreesboro, Tennessee 37132.
2. Fisheries and Oceans Canada, Marine Ecosystems and Aquaculture Division, Pacific Biological Station, 3190 Hammond Bay Road, Nanaimo, B.C., Canada V9T 6N7.
3. INVISTA Technology Center, Dalton, Georgia 30720.
4. Retired, Fisheries and Oceans, Canada, Pacific Biological Station. Deceased 4 July 2014.